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Unit Converter

Conversion formula

The conversion factor from feet per second to knots is 0.59248380129641, which means that 1 foot per second is equal to 0.59248380129641 knots:

1 ft/s = 0.59248380129641 kt

To convert 3.9 feet per second into knots we have to multiply 3.9 by the conversion factor in order to get the velocity amount from feet per second to knots. We can also form a simple proportion to calculate the result:

1 ft/s → 0.59248380129641 kt

3.9 ft/s → V(kt)

Solve the above proportion to obtain the velocity V in knots:

V(kt) = 3.9 ft/s × 0.59248380129641 kt

V(kt) = 2.310686825056 kt

The final result is:

3.9 ft/s → 2.310686825056 kt

We conclude that 3.9 feet per second is equivalent to 2.310686825056 knots:

3.9 feet per second = 2.310686825056 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.4327717582307 × 3.9 feet per second.

Another way is saying that 3.9 feet per second is equal to 1 ÷ 0.4327717582307 knots.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three point nine feet per second is approximately two point three one one knots:

3.9 ft/s ≅ 2.311 kt

An alternative is also that one knot is approximately zero point four three three times three point nine feet per second.

Conversion table

feet per second to knots chart

For quick reference purposes, below is the conversion table you can use to convert from feet per second to knots

feet per second (ft/s) knots (kt)
4.9 feet per second 2.903 knots
5.9 feet per second 3.496 knots
6.9 feet per second 4.088 knots
7.9 feet per second 4.681 knots
8.9 feet per second 5.273 knots
9.9 feet per second 5.866 knots
10.9 feet per second 6.458 knots
11.9 feet per second 7.051 knots
12.9 feet per second 7.643 knots
13.9 feet per second 8.236 knots